Electric selecting apparatus



July 10, 1928. 1,676,447

C. L. KRUM ET AL ELECTRIC SELECTING APPARATUS Original Filed Dec. 23.1919 liwam'aw m x, m am/x a Patented July 10, 1928.

UNITED STATES CHARLES KRUM AND HOWARD L. KRUM, OF CHICAGO, ILLINOIS,ASSIGNORS TO PATENT OFFICE.

MORKRUM-KLEINSCEMIDT CORPORATION, CHICAGO, ILLINOIS, A CORPORATION OFDELAWARE.

ELECTRIC SELECTING APPARATUS.

Original application, filed December 23, 1919, Serial No. 346,948.Patent No 1,635,486. Divided and this application filed November 4,1926,; Serial No. 146,211. I

The present application is a division of the prior application filed byus in the United States Patent Office December 23, 1919, Serial No.346,948 Patent No. 1,635,486.

The improvement relates to selecting apparatus for telegraphs and moreparticularly for printing telegraphs which employ a definite interval orunit code made up of permutations of two different line conditionsextending through a definite number of'successive time intervals'orunits. The receiver selector mechanism for .such telegra-phs usuallycomprises a set of selectors corresponding in number to theselecting-intervals or units of the signal, andwhich are conditioned orset in different combinations in accordance with the code permutations.

The present invention seeks to provide a simple selecting apparatus inwhich the selectors are conditioned or set in different combinationsunder the joint mechanical control of a rotary, motor driven shaft, orits equivalent, and the armature of a single magnet which is responsiveto the code permutations either of positive and negative or of currentand no currentunits, To this end the improved apparatus comprises aselector setting or conditioning member which is moved b a motor drivenshaft or its equivalent and, preferably, in a circular path through aseries of positions corresponding in number to the selectors, togetherWith a cam which cooperates with the motor driven shaft and is providedwith a series of projecting cam lugs for shifting the selector settingmember at an angle to its path of movement to thereby effect theselector conditioning or setting operations, such operations beingmechanically controlled by the armature of a single selecting magnet.The invention further consists in the features of improvementhereinafter set forth, illustrated in the preferred form in theaccompanying drawing, and more particularly pointed out in the appendedclaims.

In the drawing:

Fig. 1 is a view in elevation of the selecting apparatus, parts of thesupporting frame being shown in section.

Fig. 2 is a front elevation, and Fig. 3 is a rear elevation of partsShown in Fig. 1.

The improved selecting apparatus is under the joint mechanical controlof a rotary,

motor driven shaft 10 and an electro-magnet 11 that responds to thereceived signals The shaft 10 is journaled in suitable plates orbrackets 12 (only one of which is shown). It is continuously rotatedduring each complete selecting operation, preferably by means of amotor-driven, start and stop clutch mechanism, such as set forth, forexample, in the parent application, and which is initiated in operationin response to the starting interval or unit preceding the selectingintervals of each signal, and is arreitcd in response to spacingintervals between the signals.

' The magnet 11 is mounted on the bracket 12 and its armature 13 on a.vertical, springheld lever 14 that is pivotally mount-ed at its lowerend. In the form sh0wn, the armature lever is provided with an annularpart or cam-ring 15 which surrounds and is concentric with the shaft 10and is provided with a series of internal cam lugs 16. These cam lugsare preferably five in number and. they correspond to the selectingintervals of the signals. I

A sleeve 17, fixed to the shaft, has a lug 18 thereon to which anactuating arm 19' is centrally pivoted. This arm is providedwithinclined' cam ends which co-operate respectively with the inclinedfaces of the cam lugs 16 and with the forward ends of a series ofselector members 20. The latter are mounted upon the bracket 12 in a.circular series concentric with the shaft 10 and are preferably in theform of longitudinally movable pins mounted in bushings21 that extendthrough openings in the plate or bracket 12. Preferably, as set forth inthe "parent application, the pins serve to shift or position a set ofselectors in the form of longitudinally movable plungers 22 which inturn control all the printing operations. The rear ends of theseplungers extend through a plate 23 fixed to the upper end of the bracket12 and engage the upper ends of aseries oflevers 24. The latter arepivotally mounted between their ends on studs 25 fixed toand projectingrearwardly from the plate 12, and the lower ends of the levers areengaged by the rear headed ends of the pins 20. For the sake ofclearness; onl one lunger, lever and pin are shown in ig. 1,

ut as indicated in Figs. 2 and. 3, there are five of these partscorresponding to the selecting intervals of the signals.

A spring 26 connected to the sleeve 17 and the arm 19 tends to hold therear end of the arm against a stop lug 27 on the sleeve. As theactuating arm is rotated by the shaft, the-armature lever is shifted bythe magnet to vibrate the cam ring and move the lugs 16 thereon into andout of the path of movement of the forward end of the actuating arm, andthe rear end of the arm is shitted by the cam lugs into and out ofoperative relation with the selector pins 20. The cam lugs 16 are spacedin accordance with the spacing of the pins, the beveled edge of each lugbeing arranged slightly in advance of the corresponding pin.

The shat'tlO is continuously advanced in the direction indicated by thearrow in Fig. 2 during each COIIIPlBtO selecting operation, and thespacing of the cam lugs and pins and the timing of the shaft are suchthat the actuating arm is brought into line with the inclined portionsof the cam lugs during the mid-portions ot' the selecting intervals oftht signals. During such interval, the circuit is the magnet ll iseither closed or opened to thereby shift the cam in axial directioneither to its operative or inoperative position, so that as the armmoves past each of the selecting pins 20, the latter either remains inits normal forward position or is shifted rearwardly to thereby advancethe corresponding selector plunger 22. In this way the selectors are setin different comhinations during each complete operation. Suitable meansare provided, such as shown in the parent application, for restoring theselector plungers and pins to normal at the end of each operation.

The angular spacing of the cam lugs and pins is, as stated, such thatthe selector setting operations occur during the mid-portions of theselecting intervals of the signals. This spacing of the lugs and pins isuniform, except that the space between the end lugs and pins of the twoseries is con siderably greater to allow'for the movement of theactuating member during the starting and spacing intervals or units ofthe signal.

Obviously, the controlling magnet 11 can be arranged'to respond eitherto positive and negative impulses, or to current and no currentintervals. Other changes may be made in the details set forth withoutdeparture from the scope of the invention as defined in the appendedClaims. i

We claim as our invention:

1. An electric selector mechanism for telegraph receivers comprising aset of selectors, a common actuator for mechanically positioning saidselectors, a rotary memher for mechanically moving said actuator intorelation with said selectors one at a time, a cam having a series ofangularly spaced projecting lugs for mechanically shifting said actuatorat an angle to its path of movement to position said selectors, and amagnet having an armature mechanically and selectively controlling theselector positioning operations of said cam.

2. An electric selector mechanism for telegraph receivers comprising aset of selectors, a common actuator for mechanically positioning saidselectors, a rotary member for mechanically moving said actuator intorelation with said selectors one at a time, a cam having a seriesofangularly spaced projecting lugs for mechanically shifting saidactuator transversely of the path of movement to position saidselectors, and a magnet responsive to-received signals for shifting saidcam into and out of operative position.

8. A selector for telegraph receivers responsive to definite intervalcode signals having starting, selecting and spacing intervals-andcomprising a set of selectors, a common actuator adapted to becontinuously advanced into relation with said selectors in. successionduring each signal period. a cam having a circular series of projectinglugs angularly spaced as described in accordance With the starting,selecting and spacing intervals of the signals, for shifting saidactuator transversely of its path of movement to position saidselectors, and a magnet having an armature mechanically controlling theselector positioning operations of said cam.

4- A selector for telegraph receivers responsive to definite intervalcode signals and comprising a set'of selecting elements arranged in acircular series, a common rotary actuator adapted to be continuouslyadvanced into relation With said selectors in succession, a cam having acircular series of projecting lugs'for shifting said actuatortransversely of its path of movement to position said selectingelements, said selecting elements being uniformly spaced except for therelatively greater spacing of the end elements of the series and saidcam lugs being correspondingly spaced, and a magnet responsive toreceived signals and having an armature mechanically controlling theselector-positioning operations of said cam.

5. A selector mechanism for electric telegraphs comprising a circularseries of selecting elements, a rotatable and radially movable actuatorfor positioning said Selecting elements in different combinations, amotordriven shaft for elfecting the rotary movement of said actuator, amagnet responsive to received signals and a member vibrated by saidmagnet for selectively controlling the radial movement of said actuator.

GHABLES L. KRUllL HOWARD L. KRUM.

